When you think of the surveillance state, you usually think of snoopy alphabet-soup government agencies like the FBI, IRS, DEA, NSA, or TSA, or cyber-snoops at Facebook or Google, says Natasha Singer in The New York Times. But there’s a company you’ve probably never heard of that “peers deeper into American life,” and probably knows more about you than any of those groups: Little Rock–based Acxiom Corp. Jeffrey Chester at the Center for Digital Democracy has dubbed Acxiom “Big Brother in Arkansas,” while Gizmodo’s Jamie Condliffe calls it the “faceless organization that knows everything about you.” Here’s what you should know about the company:

What is Acxiom Corp., and what does it do?

The company fits into a category called database marketing. It started in 1969 as an outfit called Demographics Inc., using phone books and other notably low-tech tools, as well as one computer, to amass information on voters and consumers for direct marketing. Almost 40 years later, Acxiom has detailed entries for more than 190 million people and 126 million households in the U.S., and about 500 million active consumers worldwide. More than 23,000 servers in Conway, just north of Little Rock, collect and analyze more than 50 trillion data ‘transactions’ a year. “In essence, it’s as if the ore of our data-driven lives were being mined, refined, and sold to the highest bidder, usually without our knowledge,” says The Times’ Singer.